<!doctype html>
<html>
	<head>
		<meta http-equiv="content-Type" content="text/html;charset=utf-8">
		<!--当前页面的三要素-->
		<title>第九节，标签的查漏补缺</title>
		<meta name="keywords" content="关键词,关键词">
		<meta name="description" content="">

		<!--css,js-->
		<style type="text/css">
			*{margin:0;padding:0;}
			body{font-size:12px;font-family:"微软雅黑"; color:#000}
			.pr{width:700px;border:1px solid #000;margin:10px auto;}
			h2,h3{text-align:center;}
			.pr .kj{height:200px;}
			.pr .kj .three{width:350px;float:left;}
			.pr .kj .hh{width:350x;float:right;}
		</style>
	</head>
<body>
	<h1>第九节，标签的查漏补缺</h1>	
	<div class="pr">
	<h2>pre标签输出网页源码</h2>
	<pre>
	&lt!doctype html&gt
	&lt html&gt
		&lt head&gt
			&lt meta http-equiv="content-Type" content="text/html;charset=utf-8"&gt
			&lt!--当前页面的三要素--&gt
			&lt title&gt第九节，标签的查漏补缺&lt/title&gt
			&lt meta name="keywords" content="关键词,关键词"&gt
			&lt meta name="description" content=""&gt

			&lt!--css,js--&gt
			&lt style type="text/css"&gt
				*{margin:0;padding:0;}
				body{font-size:12px;font-family:"微软雅黑"; color:#000}
				.pre{width:700px;border:1px solid #000;}
			&lt/style&gt
		&lt/head&gt
	&lt body&gt
		&lt h1&gt第九节，标签的查漏补缺&lt/h1&gt	
		&lt div class="pre"&gt
			
		&lt/div&gt
	&lt/body&gt
	&lt/html&gt
	</pre>
	</div>
	<div class="pr">
		<h2>frameset框架</h2>
		<div class="kj">
			<div class="three">
				<h3>左中右框架</h3>
				<iframe src="frameset.html"></iframe>
			</div>
			<div class="hh">
				<h3>上下结构框架</h3>
				<iframe src="frameset2.html"></iframe>
			</div>
		</div>
	</div>
	<div class="pr">
		<h2>内链框架</h2>
		<iframe src="a.html"></iframe>
	</div>
</body>
</html>